Ice Fishing Luck

Bob is sitting on the ice all day fishing with no luck, not even a nibble. Cold and tired he is about to leave, when a guy walks up cuts a hole in the ice beside him, and starts pulling out fish as fast a he can drop his hook in the water.
Bob can't believe it, he yells over " whats your secret?"

"woogatkakeptewrwm" he answers back.

"what did you say?" replies Bob.

The man spits a large ball of worms on the ice and says to Bob, " you have to keep your worms warm".